The main downside is that you have different numbers for each eSIM, but that doesn't really affect me because I use Google Voice for SMS.
https://www.google.com/appsstatus/dashboard/incidents/THtvkD...
But yeah I probably should have clarified that Google Voice has been a pretty terrible UX and quality overall for years. I really need to just bite the bullet and port my number out.
I use them for my work phone, but there are a few things keeping me from switching away from T-Mobile for my personal lines (and I'd VERY MUCH like to switch):
- I have a family plan wherein I pay something like $254/mo for seven voice/data lines, two smartwatch lines and two tablet data lines. The phone lines all have unlimited data at full speed.
- T-Satellite just launched (wherein your phone uses Starlink when terrestrial towers aren't available). I'm not in this situation often but it can be useful.
- My plan provides free Wi-Fi on United. I fly a lot and use this benefit all of the time. Losing it would negate the savings I'd rack up from switching to US Mobile.
I was previously on Google Fi, and MVNO roaming is bloody fantastic - I always had reception.